21. A railroad fusee was timed to burn for ten minutes and quantities were dropped behind a train to ensure a safe spacing. 22. Another type of flare is the " fusee ", which burns for 10 60 minutes with a bright red light. 23. Fusees are also known as " railroad flares " and are commonly used to perform hand signals in rail transport applications.24. Gruet of Geneva is widely credited with introducing them in 1664, although the first reference to a fusee chain is around 1540. 25. The pendulum was a novelty; so were the spiral spring and anchor escapement invented by Robert Hooke, and the fusee chain. 26. His dam, Fusee made little impact as a racehorse, and was close to being destroyed after her career was ended by injury. 27. The pendulum clock with an anchor escapement, invented in 1670, was sufficiently independent of drive force so that only a few had fusees . 28. In the 18th century the original verge escapement, which required a fusee , was gradually replaced in better French watches with the duplex escapement. 29. Logical One is a reinvention of the chain-and-fusee constant force mechanism, with a snail cam replacing the cone-shaped fusee. 30. Logical One is a reinvention of the chain-and-fusee constant force mechanism, with a snail cam replacing the cone-shaped fusee .
